Conclusion

The GF 100-200mm f/5.6 R LM OIS WR is the only telephoto zoom lens available for Fujifilm's medium-format system, and thankfully it's a very good one. Along with the wide-angle GF 32-64mm f/4 R LM WR and standard GF 45-100mm f/4 R LM OIS WR, it forms a fantastic zoom kit that covers almost every focal length that you'll ever need.

The GF 100-200mm is a sharp lens throughout the zoom and aperture range, exhibits almost no chromatic aberrations, has negligible distortion at either end of the zoom range, and is capable of producing some very nice bokeh despite only having an f/5.6 maximum aperture. Vignetting at wide-open apertures is the only real optical issue of note, although stopping down to f/8 pretty much solves the problem altogether.

The main downsides to this lens are the slow-ish maximum aperture of F5.6 and the limited telephoto reach of 158mm in 35mm terms. The second limitation can be practically overcome by purchasing and fitting the optional 1.4x teleconverter, but that does exacerbate the first limitation, slowing the maximum aperture even further to F8. In turn the optical image stabilisation system allows you to hand-hold the camera in much lower light levels than usual, but is only suitable for still subjects rather than moving ones. Fujifilm could possibly have made the lens faster and longer, but only at the expense of also making it bigger and heavier, therefore making it less portable and versatile.

Overall, the GF 100-200mm f/5.6 R LM OIS WR is another great addition to the fledgling range of Fujifilm medium-format lenses. It's not quite as stellar as the 45-100mm or the 32-64mm F4 zooms, but nevertheless is an excellent lens in its own right that really extends the versatility of the overall GFX system.

Ratings (out of 5)
Design	4
Features	4
Ease-of-use	4.5
Image quality	4.5
Value for money	4